Boiler-pukwace



No. 46,725. PATENTED MAR. 7, 1865. B. O. STRANGE & G. R. HUNTLBY.

BOILER FURNACE.

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FFTC EMERSON C. STRANGE AND GEORGE R. HUNTLEY, OF TAUNTON,MASSACHUSETTS.

BOILER-FURNACE.

To all whom it may concern:

Be it known that we, EMERSON C. STRANGE and GEORGE R. HUNTLEY, ofTaunton, in the county of Bristol and State of assachusetts, haveinvented a new and useful Improvement in Furnaces; and we do herebydeclare that the following is a full, clear, and exact descriptionthereof, which will enable others skilled in the art to make and use thesame, reference being had to the accompanying drawings, forming part ofthis specification, in which Figure l, is a front elevation of ourimprovement.- Fig. 2, is an elevation thereof as seen from within thefurnace. Fig. 3, is an elevation of a vertical cross section taken 011the line 00 of Fig. 2.

Similar letters of reference indicate like parts.

This invention consists in devices for supplying currents of air andsteam to furnaces of steam boilers and to other furnaces.

A represents the wall of a furnace in which coal or other fuel isconsumed for the purpose of producing heat. An opening is made in thewall to receive a casing B, which may be circular or of any other shape,and of dimensions to suit the size of the furnace and the amount of workto be done therewith. The casing is furnished with doors F.

C is a hollow hub which is fixed and held centrally in the casing B, bymeans of pipes D, D which extend radially therefrom to the casing B, inthe interior wall of which they are securely fixed. Those ends of thepipes D which are connected to the casing B are closed, but the endswhich are connected to the hub C are open and communicate with thehollow space thereof. The pipe D is open throughout and passes throughthe casing so that it may be connected to a steam pipe leading from asteam boiler, or to the exhaust pipe of a steam en- '1116.

b The hub C has an axial perforation whose sides are closed, and whichreceives the shaft a of a wind wheel or blower E whose vanes are insideof the pipes D. The blowershaft (4 rotates freely within the hub C. Thepipes D are perforated on the sides opposite to theblower so that anysteam or vapor forced or emitted through them will strike its vanes andcause itto revolve after the manner of a wind wheel.

The operation of our improvement is as follows-the furnace to which ourimprovement is applied having been started and steam having been got-tenup, in cases Where the furnace is connected to a steam boiler, a currentof steamv is allowed to flow through the pipe D into the hub C whence itis dis tributed into the radial pipes D, through whose perforated sidesit issues against the vanes of the wind-wheel E, which is thereby put inmore or less rapid revolution according to the force of the steam. Therevolution of the wheel will drive the air which lies before it into thefurnace and thereby create a partial vacuum which will be filled withfresh air from without, and thus a steady and rapid current ofatmospheric air will be supplied to the furnace while the wheelcontinues to rotate. The partial vac uum will also be promoted by therapid passage of the steam from the pipes D into the furnace. Thecurrents thus supplied to the fire will be composed of mingled steam andair, and they will act upon the fire of the furnace, so far as relatesto their mechanical effect, after the manner of a blast. The steam thuscommunicated to the fire, becoming highly heated, will be decomposed,and its elements will assist in the combustion of the fuel and itsgases.

The casing B may be situated in the furnace wall either below or abovethe grate bars at the discretion of those who use our improvement, andthe steam-pipe D may be connected to the exhaust pipe of a steam engine,thereby utilizing the exhaust steam, or the wheel E may be driven bycompressed air passed through the pipe hen it is desired to shut off theatmospheric air from the furnace the doors F are to be closed, and steamalone, or whatsoever vapor is passed through the pipe D, will beadmitted into the furnace. In that case the wind-wheel may be locked orit may be allowed to rotate so as to assist the distribution of thevapor.

e do not claim supplying steam to furnaces for the purpose of promotingthe combustion of fuel and its gases, but,

e claim as our own invention and desire to secure by Letters-Patent-,

Walls of a furnace, either above or below the 1. The combination of aWind Wheel With shutting off the supply of atmospheric air, series ofperforated pipes placed in the substantially as above set forth.

EMERSON G. STRANGE.

'rate bars thereof substantially as and for a I 5 the purposes above setforth. HUNTLEY' 2. The combination of the open casing B lNitnesses:provided with perforated pipes leading from LEML. T. TALBOT,

a central hub as described With doors F for EDWIN S. TI-IAYER.

